Slub cutter



July 6 1926'.

D. A. MCKENZIE SLUB CUTTER Filed Nov. 11, 1924 INVENTOR Dam/u a H. Mc KEn/Z/E A TTOR/VE Y l atented July 6, 192G.

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ems CUTTER.

Application filed November 11,1924. Serial No. 7491-92:

My invention relates to slub cutters, and provides among other features of structural advantage, a freely swinging blade of economical construction, means for readily de teaching the same from its carrier to facilitate cleaning, substitutionof the knife, etc,- without disturbing the adjustment of the cutter mechanism as a whole, and means for readily adjusting the parts not only with respect to each other, but also with respect to the support. Referring to the accompanying draw- 1ngs Fig. 1 is a partial side elevation of an installation in which my improved slub cutter is shown'in one form;

Fig. 2 is brokenside elevation of the slub cutter viewed at right angles to Fig. 1; Fig. 3 is a section on the line 33, Fig. 2; and

Fig. 4 is a: side elevation of the cutter blade detached.

Toil'lustra-te the invention I have shown in Fig. 1 aspool 5 upon which the thread "6 is wound from the reel 7. Between the reel and spool is arranged the slub cutter to which my invention particularly relates:

.Th'e' slub cutter, as shown, comprises a clamp head 8 slotted at one end to form a pair'oi' jaws, between which" is received a thread guide bar 9 held in adjusted position by the clamping screw 10. While any suit-- able means may be provided for mounting v the clamp head u'pon an appropriatesupport, I have shown forthis purpose a rod 11 passing transversely through the thread guide 9, to which it is secured by set screw 12; Its opposite end extends to a frame member of the spo'oling machine, as" co1r-' ventionally indicated at 13.

Cooperating with the thread guide 9" is a deflecting finger 14,:by which the angle at which the thread 6 passesto the guide 9 may be varied. The deflecting finger 1 1 is shown in the form of a wire rod fastened at one end in a collar 15 rotatably mounted on the guide 9 and held in adjusted position thereon by means of the set screw 16.

T16 blade carrier 17 which extends parallel to the thread guide 9, is clamped by screw 18 between jaws formed at the oppo site end of the clamp head 8. While the carrier may be formed in various ways, I have used for this purpose a solid bar provided at its free end with a longitudinally extending segmental slot 19 in which is re hold the latter, in position in the slot, the

ends of the blade are notched at 21 to receive the legs 22 and 23 .ot a cooperating spring catch 24. The anchor leg 22 of the catch passes through the carrier bar at a point intersecting the segmental slot 19, while the leg of the catch is'freely seated in a transverse notch '25 in the end or the carrier bar 17. The spacing and location of the legs 22 and23 of the spring catch 24 is such that while they engage in the notches 21 in the blade, and thus prevent itsescape fronrthe carrier, they are so loosely engaged that they do not interfere with .its treely swing: ii -g transverse movement in the segmental slot 19. They are of course so positioned that the blade edge is parallel to the axis of the thread guide bar 9. I A side recess 26 may be formed in the blade carrier to accommodate the loop 27 and adjacent portions of the spring latch.

In properly adjusted position for operation, the cutting edge 28 of the blade 20 lies parallel and adjacent to the thread guide 9, but sufiiciently spaced therefrom to permit the thread to pass freely. The blade is positively supported in this position vby one side a of the vV-sl0t 19' in the carrier bar, which for this purpose is rotated until the side a of the slot picks up the freely hung blade, and deflects it slightly from the vertical, in which adjusted po'sition the carrier is clam-pedtast. The position of the blade edge with respect to the thread guide 9 isth-us positively located while leaving the blade tree to swing across the slot 19 toward the guide bar 9 to engage and cutthe thread; The position (of the blade indicated is that at which it is most sensitively responsive, but it will be understood that on varying the angular position f the clamp head 8' on the thread" guide 9, followed by appropriate modification of: the position of the blade carrier 17 and deflect ing finger 14:, various conditions can be arrived at to meet particular conditions.

The operation of the cutter is obvious. If the thread passing from reel 7 to spool 5 over guide 9 contains an enlargement such as the slub 00, the latter engages the edge of the blade and swings it toward the fixed guide bar 9, against which the thread is pinched and cut. hen the slub has been removed and the ends of the thread properly joined by the attendant, the thread is again rpi passed over the guide bar 9 beneath the deflecting finger let and knife (the latter having resumed its normal position by gravity) and the spooling operation is resumed.

Should it be necessary to clean or replace the blade 20 it may be readily removed from its carrier 17 by merely freeing the leg ot' the spring catch El and shifting it out of obstructing position. The blade may be then removed and cleaned and the guide bar 9 wiped to remove any deposits thereon which interfere with the free travel of the thread. I? disturbance of the adjusted parts is necessary, either for the removal or replacement of the blade.

The adjustability of the clamp longitudinally with respect to the supporting arm 11, the angular adjustability of the dellccting linger ll, the blade carrier 17, and the clamping bracket 8 with respect to the thread guide bar 9, and with respect to each other, renders the attachment readily adapt able to various locations and conditions, and makes possible a very tine adjustment oi the parts so that the device may be used to dvantage for detecting imperfections in such fine threads as silk, artificial silk f ber, etc. The ready demountabilily of the blade by an operation which disturbs none ot the adjustments-diet even of the blade carrier makes it easy to keep the cutter parts "tree from gununing. etc, and permits repla e ineut of the cutter blade with only a lyw seconds interruption of the winding operation. The freely swinging blade is very sensitively responsive and swings into active position on very light stress. The structure as a whole is economically manufactured and is readily adapted, not only to various locations but for use with threads of dif erent dernier.

Various modifications of structure will readily occur to those skilled in the art, which attain the advantages of the construction without departing from what I claim as my in ention.

I claim 1. In a slub cutter, a support, blade carrier adjustably mounted therein and re cessed to ali'ord a segmental V-slot, and a cutter blade mounted in said slot with freedom to swing thereacross, the edge of the blade projecting beyond the carrier.

2. In a slub cutter, a blade carrier bar recessed to atl'ord a segmental V-slot, a cutter blade accommodated in said slot, and a blade latch having an engaging member extending transversely of the V-slot.

3. In av slub cutter, a blade carrier bar recessed to afford a segmental V-slot, a cutter blade accounnodated in said slot, a readily displaceable blade support mounted on the carrier and extending across one end of the V-slot for engagement with the blade end, and a cooperating stationary support for the opposite end of the blade.

4. In a slub cutter, a blade carrier bar recessed to afford a segmental V-slot, a cutter blade accon'unodated in said slot, and :1 blade-detaining member comprising a pair of parallel legs intersecting the V-slot and engaging the opposite ends of the blade.

In a slab cutter, a blade carrier bar recessed to atl'ord a s ,Q mental V-slot, a cutter blade accommodated in said slot, and a blade-detaining member comprising a pair of parallel legs intersecting the V-slot and engaging the opposite ends of the blade. one oi said legs being readily displaceable to permit removal of the blade without [listurbance ot the carrier.

6. In a slub cutter, a support, a thread guide mounted thereon, a clamp head adjustably secured on the thread guide, a blade carrier adjustably secured to the clamp head, and a cutter blade mounted for ready detachability on said carrier and adapted for cooperation with the thread guide, together with a deflecting linger adjustably mounted on the thread guide and independent of the clamp head. said deflecting finger governing the angle of approach of the thread to the guide in the neighborhood of the cutter blade.

1'. In a slub cutter, a support, a thread guide adjustably mounted with respect to said support, a blade carrier adjustable with respect to said support and with respect to the thread guide, together with a deflecting linger adjustable both with respect to the thread guide and with respect to the blade carrier, said parts forming a unitary attachment.

In testimony whereof I have signed my name to this specification.

DONALD A. MCKENZIE. 

